<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary"
                     @click="btnAddRole">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList"
                border
                stripe>
        <el-table-column type="expand"
                         label="#">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']"
                    v-for="(item1, i1) in scope.row.children"
                    :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable
                        @close="removeRightById(scope.row,item1.id)"> {{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for 循环 嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' :'bdtop','vcenter']"
                        v-for="(item2, i2) in item1.children"
                        :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success"
                            closable
                            @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3) in item2.children"
                            :key="item3.id"
                            type="warning"
                            closable
                            @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"
                         label="#"></el-table-column>
        <el-table-column label="角色名称"
                         prop="roleName"></el-table-column>
        <el-table-column label="角色描述"
                         prop="roleDesc"></el-table-column>
        <el-table-column label="操作"
                         width="300px">
          <template slot-scope="scope">
            <el-button type="primary"
                       icon="el-icon-edit"
                       size="mini"
                       @click="roleEdit(scope.row.id)">编辑</el-button>
            <el-button type="danger"
                       icon="el-icon-delete"
                       size="mini"
                       @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning"
                       icon="el-icon-setting"
                       size="mini"
                       @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 添加角色的对话框 -->
      <el-dialog title="添加角色"
                 :visible.sync="addRoleVisible"
                 width="50%"
                 @close="addDialogClosed">
        <!-- 内容主体区域 -->
        <el-form :model="addForm"
                 :rules="addFormRule"
                 ref="addFormRef"
                 label-width="100px">
          <el-form-item label="角色名称"
                        prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述"
                        prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer"
              class="dialog-footer">
          <el-button @click="addRoleVisible = false">取 消</el-button>
          <el-button type="primary"
                     @click="addRole">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 编辑角色区域 -->
      <!-- 添加用户的对话框 -->
      <el-dialog title="编辑角色"
                 :visible.sync="editRoleVisible"
                 width="50%"
                 @close="editDialogClosed">
        <!-- 内容主体区域 -->
        <el-form :model="editForm"
                 :rules="editFormRule"
                 ref="editFormRef"
                 label-width="100px">
          <el-form-item label="角色名称"
                        prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述"
                        prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer"
              class="dialog-footer">
          <el-button @click="editRoleVisible = false">取 消</el-button>
          <el-button type="primary"
                     @click="editRole">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 分配权限的对话框 -->
      <el-dialog title="分配权限"
                 :visible.sync="setRightDialogVisible"
                 width="50%"
                 @close="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightsList"
                 :props="treeProps"
                 show-checkbox
                 accordion
                 node-key="id"
                 :default-checked-keys="defKwys"
                 ref="treeRef"></el-tree>
        <span slot="footer"
              class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary"
                     @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  data () {
    return {
      roleList: [],
      addRoleVisible: false,
      editRoleVisible: false,
      setRightDialogVisible: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      editForm: [],
      addFormRule: {
        roleName: [
          { required: true, message: '请输入用户邮箱', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入密码！', trigger: 'blur' }
        ]
      },
      editFormRule: {
        roleName: [
          { required: true, message: '请输入用户邮箱', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入密码！', trigger: 'blur' }
        ]
      },
      rightsList: [],
      // 树形控件的树形绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点数组
      defKwys: [],
      // 即将分配权限角色的id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
      this.roleList = res.data
    },
    btnAddRole () {
      this.addRoleVisible = true
    },
    addRole () {
      this.$refs.addFormRef.validate(async vaild => {
        if (!vaild) return
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败！')
        }
        this.$message.success('添加角色状态成功！')
        this.addRoleVisible = false
        this.getRolesList()
      })
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    async roleEdit (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      this.editForm = res.data
      console.log(res.data)
      this.editRoleVisible = true
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    editRole () {
      this.$refs.editFormRef.validate(async vaild => {
        if (!vaild) return
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc
        })
        console.log(res)
        if (res.meta.status !== 200) return this.$message.error('!修改角色信息失败！')
        this.editRoleVisible = false
        this.getRolesList()
        this.$message.success('修改角色信息成功！')
      })
    },
    async removeRoleById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除！')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除用户失败！')
      this.$message.success('删除用户成功！')
      this.getRolesList()
    },
    // 根据 id 删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('取消了删除！')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败！')
      role.children = res.data
      this.$message.success('删除权限成功！')
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限列表失败！')
      // 获取到的权限数据保存到data中
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKwys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式获取角色项三级权限项的 id 并保存到数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKwys = []
    },
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('更新权限失败！')
      this.$message.success('更新权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}

</script>

<style scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
